%0 Journal Article
%T Electron-induced nuclear magnetic ordering in n -type semiconductors
%+ Laboratoire Charles Coulomb (L2C)
%+ Saint Petersburg State University (SPBU)
%A Vladimirova, M.
%A Scalbert, Denis
%A Kuznetsova, M., S
%A Kavokin, K., V
%< avec comité de lecture
%@ 2469-9950
%J Physical Review B
%I American Physical Society
%V 103
%N 20
%P 205207
%8 2021-05
%D 2021
%R 10.1103/PhysRevB.103.205207
%Z Physics [physics]Journal articles
%X Nuclear magnetism inn-doped semiconductors with a positive hyperfine constant is revisited. Two kindsof nuclear magnetic ordering can be induced by resident electrons in a deeply cooled nuclear spin system.At positive nuclear spin temperature below a critical value, randomly oriented nuclear spin polarons similarto that predicted by Merkulov [Phys. Solid State40, 930 (1998)] should emerge. These polarons are orientedrandomly, and within each polaron, nuclear and electron spins are aligned antiferromagnetically. At negativenuclear spin temperature below a critical value, we predict another type of magnetic ordering—a dynamicallyinduced nuclear ferromagnet. This is a long-range ferromagnetically ordered state involving both electrons andnuclei. It can form if electron spin relaxation is dominated by the hyperfine coupling, rather than by the spin-orbitinteraction. Application of the theory to then-doped GaAs suggests that ferromagnetic order may be reached atexperimentally achievable nuclear spin temperatureN≈−0.5μK and lattice temperatureTL≈5K.
%G English
%2 https://hal.science/hal-03246864/document
%2 https://hal.science/hal-03246864/file/Vladimirova_Electron-induced%20nuclear%20magnetic%20ordering%20in%20n-type%20semiconductors-PRB2021.pdf
%L hal-03246864
%U https://hal.science/hal-03246864
%~ CNRS
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ UM-2015-2021